[tex]18)a)3x = 17 \\ x = \frac{17}{3} apartine \: lui \: q[/tex]
[tex]b) - 5x = 23 \\ x = - \frac{23}{5} [/tex]
[tex]c)x + 7x = 4 - 3 \\ 8x = 1 \\ x = \frac{1}{8} [/tex]
[tex]19)a) - x = 1 \\ x = - 1 \\ ec \: echivalenta \\ x - 4 = - 5 \\ x - 3 = - 4[/tex]
[tex]3x = 9 \\ x = 3 \\ ec \: echivalenta \\ x + 2 = 5 \\ x + 3 = 6[/tex]
[tex]c)4x + 3x = 12 + 2 \\ 7x = 14 \\ x = 2 \\ ec \: echivalenta \\ x + 2 = 4 \\ x + 4 = 6[/tex]
